make casing consistent with other configuration

Author: pascalkuthe

book/src/themes.md

@@ -13,7 +13,7 @@ The default theme.toml can be found [here](https://github.com/helix-editor/helix
 Each line in the theme file is specified as below:
 
 ```toml
-key = { fg = "#ffffff", bg = "#000000", underline_color = "#ff0000", underline_style = "curl", modifiers = ["bold", "italic"] }
+key = { fg = "#ffffff", bg = "#000000", underline-color = "#ff0000", underline-style = "curl", modifiers = ["bold", "italic"] }
 ```
 
 where `key` represents what you want to style, `fg` specifies the foreground color, `bg` the background color, `underline_style` the underline style, `underline_color` the underline color (only meaningful if an underline style is enabled), and `modifiers` is a list of style modifiers. `bg`, `underline` and `modifiers` can be omitted to defer to the defaults.
@@ -91,7 +91,7 @@ Less common modifiers might not be supported by your terminal emulator.
 
 ### Underline Style
 
-One of the following values may be used as an `underline_styles`. 
+One of the following values may be used as an `underline-style`. 
 
 Some styles might not be supported by your terminal emulator.
 
@@ -101,7 +101,7 @@ Some styles might not be supported by your terminal emulator.
 | `curl`         |
 | `dashed`       |
 | `dot`          |
-| `double-line`  |
+| `double_line`  |
 
 
 ### Scopes

helix-view/src/theme.rs

@@ -277,8 +277,8 @@ impl ThemePalette {
                 match name.as_str() {
                     "fg" => *style = style.fg(self.parse_color(value)?),
                     "bg" => *style = style.bg(self.parse_color(value)?),
-                    "underline_color" => *style = style.underline_color(self.parse_color(value)?),
-                    "underline_style" => {
+                    "underline-color" => *style = style.underline_color(self.parse_color(value)?),
+                    "underline-style" => {
                         warn!("found style");
                         *style = style.underline_style(Self::parse_underline_style(&value)?)
                     }

runtime/themes/dark_plus.toml

@@ -92,8 +92,8 @@
 "info" = { fg = "light_blue" }
 "hint" = { fg = "light_gray3" }
 
-"diagnostic.error" = {underline_color = "red", underline_style = "curl"}
-"diagnostic" = {underline_color = "gold", underline_style = "curl" }
+"diagnostic.error" = {underline-color = "red", underline-style = "curl"}
+"diagnostic" = {underline-color = "gold", underline-style = "curl" }
 
 [palette]
 white = "#ffffff"

runtime/themes/onedark.toml

@@ -39,10 +39,10 @@
 "diff.delta" = "gold"
 "diff.minus" = "red"
 
-"diagnostic.info" = { underline_color = "blue", underline_style = "curl" }
-"diagnostic.hint" = { underline_color = "green", underline_style = "curl" }
-"diagnostic.warning" = { underline_color = "yellow", underline_style = "curl" }
-"diagnostic.error" = { underline_color = "red", underline_style = "curl" }
+"diagnostic.info" = { underline-color = "blue", underline-style = "curl" }
+"diagnostic.hint" = { underline-color = "green", underline-style = "curl" }
+"diagnostic.warning" = { underline-color = "yellow", underline-style = "curl" }
+"diagnostic.error" = { underline-color = "red", underline-style = "curl" }
 "info" = { fg = "blue", modifiers = ["bold"] }
 "hint" = { fg = "green", modifiers = ["bold"] }
 "warning" = { fg = "yellow", modifiers = ["bold"] }